CN108907336B - Control method of numerical control double-station cutting machine - Google Patents
Control method of numerical control double-station cutting machine Download PDFInfo
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- CN108907336B CN108907336B CN201810637572.9A CN201810637572A CN108907336B CN 108907336 B CN108907336 B CN 108907336B CN 201810637572 A CN201810637572 A CN 201810637572A CN 108907336 B CN108907336 B CN 108907336B
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- 238000000034 method Methods 0.000 title claims abstract description 17
- 230000007246 mechanism Effects 0.000 claims description 39
- 239000002173 cutting fluid Substances 0.000 claims description 35
- 235000014676 Phragmites communis Nutrition 0.000 claims description 21
- 239000006148 magnetic separator Substances 0.000 claims description 16
- 238000003825 pressing Methods 0.000 claims description 14
- 230000006698 induction Effects 0.000 claims description 6
- 230000001960 triggered effect Effects 0.000 claims description 6
- 238000007723 die pressing method Methods 0.000 claims description 5
- 230000001133 acceleration Effects 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims 3
- 230000000630 rising effect Effects 0.000 claims 1
- 238000012545 processing Methods 0.000 abstract description 10
- 230000007306 turnover Effects 0.000 abstract description 5
- 238000012423 maintenance Methods 0.000 abstract description 2
- 238000004519 manufacturing process Methods 0.000 abstract description 2
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- 230000001360 synchronised effect Effects 0.000 description 2
- 206010000372 Accident at work Diseases 0.000 description 1
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Classifications
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/02—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage
- B23D45/021—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a circular saw blade or the stock mounted on a carriage with the saw blade mounted on a carriage
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D45/00—Sawing machines or sawing devices with circular saw blades or with friction saw discs
- B23D45/10—Sawing machines or sawing devices with circular saw blades or with friction saw discs with a plurality of circular saw blades
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/02—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of frames; of guiding arrangements for work-table or saw-carrier
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D47/00—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts
- B23D47/04—Sawing machines or sawing devices working with circular saw blades, characterised only by constructional features of particular parts of devices for feeding, positioning, clamping, or rotating work
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/001—Measuring or control devices, e.g. for automatic control of work feed pressure on band saw blade
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23D—PLANING; SLOTTING; SHEARING; BROACHING; SAWING; FILING; SCRAPING; LIKE OPERATIONS FOR WORKING METAL BY REMOVING MATERIAL, NOT OTHERWISE PROVIDED FOR
- B23D59/00—Accessories specially designed for sawing machines or sawing devices
- B23D59/006—Accessories specially designed for sawing machines or sawing devices for removing or collecting chips
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/08—Protective coverings for parts of machine tools; Splash guards
- B23Q11/0891—Protective coverings for parts of machine tools; Splash guards arranged between the working area and the operator
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1069—Filtration systems specially adapted for cutting liquids
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B23—MACHINE TOOLS; METAL-WORKING NOT OTHERWISE PROVIDED FOR
- B23Q—DETAILS, COMPONENTS, OR ACCESSORIES FOR MACHINE TOOLS, e.g. ARRANGEMENTS FOR COPYING OR CONTROLLING; MACHINE TOOLS IN GENERAL CHARACTERISED BY THE CONSTRUCTION OF PARTICULAR DETAILS OR COMPONENTS; COMBINATIONS OR ASSOCIATIONS OF METAL-WORKING MACHINES, NOT DIRECTED TO A PARTICULAR RESULT
- B23Q11/00—Accessories fitted to machine tools for keeping tools or parts of the machine in good working condition or for cooling work; Safety devices specially combined with or arranged in, or specially adapted for use in connection with, machine tools
- B23Q11/10—Arrangements for cooling or lubricating tools or work
- B23Q11/1076—Arrangements for cooling or lubricating tools or work with a cutting liquid nozzle specially adaptable to different kinds of machining operations
Abstract
The invention discloses a control method of a numerical control double-station cutting machine, which comprises the steps that a PLC receives a position signal of a position feedback sensor to judge, when a feeding position is close to a 1/3 position of the upper part of a workpiece, the PLC controls a servo proportional valve to increase in opening degree, feeds and accelerates to cut the workpiece, and when the feeding position is close to the 1/3 position of the lower part of the workpiece, the PLC controls the servo proportional valve to decrease in opening degree, and feeds and decelerates to cut the workpiece. The invention has the advantages of less turnover times of the processed workpiece, high processing efficiency, small equipment occupation area, low manufacturing cost, high processing control precision, high safety performance and convenient maintenance.
Description
Technical Field
The invention belongs to the field of cutting machines, and particularly relates to a cutting machine for synchronously cutting two ends of a workpiece and an electric automatic control method.
Background
The workpiece is generally bent by a numerical control bending machine so as to meet the requirement of bending angles, the workpiece is required to be further cut and machined in order to meet the end face sizes and end face qualities of two ends of the bent workpiece, the conventional cutting machine mostly adopts the process of sequentially cutting two ends of the workpiece, and the workpiece is required to be clamped again when the cutting process of one end is completed, so that the turnover times of the workpiece is increased, and the machining efficiency is reduced.
Disclosure of Invention
The invention aims to provide a numerical control double-station cutting machine, which reduces turnover and equipment occupation area so as to reduce cost, and simultaneously provides a PLC electrical control method.
According to one aspect of the invention, a digitally controlled double-station cutter includes a cutting mechanism and a clamping mechanism,
the cutting mechanism has two groups, and every group cutting mechanism includes feed cylinder, motor and saw bit, and the saw bit is installed in the motor, and the motor is installed in feed cylinder, and clamping mechanism has two groups, and every group clamping mechanism includes clamping cylinder and work piece profile modeling mould, and work piece profile modeling mould is installed in clamping cylinder, and two groups cutting mechanism and two groups clamping mechanism are installed with matcing.
Because the workpiece two ends adopt two workpiece profiling moulds imitating workpiece shapes to position and clamp by utilizing two clamping cylinders, the positioning precision is high, the clamping position is close to the cut section, the vibration of the workpiece in the processing process is reduced, the two feeding cylinders respectively drive the motor and the saw blade to do feeding motion to the workpiece, and the motor drives the saw blade to rotate so as to cut the two ends of the workpiece, thereby realizing the synchronous cutting of the two ends of the workpiece by the two groups of cutting mechanisms, reducing the turnover times of the workpiece, improving the processing efficiency and reducing the occupied area of equipment so as to reduce the cost.
Further, the numerical control double-station cutter further comprises a cutting fluid container, a nozzle, a spiral magnetic separator and a cutting fluid collecting container, wherein the nozzle is communicated with the cutting fluid container, the nozzle is installed towards the saw blade, the spiral magnetic separator is installed below the saw blade, the cutting fluid collecting container is installed below the spiral magnetic separator, and the cutting fluid container is communicated with the spiral magnetic separator. Therefore, the cutting fluid container sprays the cutting fluid through the nozzle to clean the cutting fluid at the cutting station, the spiral magnetic separator is utilized to separate the cutting fluid from the cutting fluid, the separated cutting fluid flows back to the cutting fluid container, and the cutting fluid falls into the cutting fluid collecting container, so that the defects that the existing pipe cutting machine filters the mixed cutting fluid and cutting fluid by adopting a filter screen, the filter screen is easy to be blocked, the cutting fluid flows to the working ground to pollute the environment are overcome, and the working ground environment is kept clean and free from the pollution of the cutting fluid.
Further, the numerical control double-station cutting machine further comprises a safety door and a safety grating, the safety door covers the saw blade and the workpiece profiling mold, the safety grating is installed along the safety door in a correlation mode, the safety door is connected with a cylinder, the cylinder is vertically arranged, the cylinder is provided with a position sensor and a first magnetic spring switch, the cylinder is connected with an air pressure source through a safety door electromagnetic reversing valve, and the safety door electromagnetic reversing valve is correspondingly connected with a rodless cavity of the cylinder and a rod cavity of the cylinder. Therefore, the safety grating prevents people or objects from entering the working area, and the safety door protects the rotary saw blade from being broken accidentally to splash and hurt people, so that the occurrence of industrial injury accidents is avoided.
Further, the numerical control double-station cut-off machine further comprises a PLC, a feeding electromagnetic directional valve, a servo proportional valve, a feeding hydraulic control one-way valve, a pressure sensor, a clamping electromagnetic directional valve and a clamping hydraulic control one-way valve, a rodless cavity of each feeding oil cylinder is sequentially connected with the pressure sensor, the feeding hydraulic control one-way valve, the servo proportional valve and the feeding electromagnetic directional valve, a rod cavity of each feeding oil cylinder is sequentially connected with the feeding hydraulic control one-way valve and the feeding electromagnetic directional valve, the feeding electromagnetic directional valve is connected with a hydraulic source, the rodless cavity and the rod cavity of each clamping oil cylinder are sequentially connected with the clamping hydraulic control one-way valve and the clamping electromagnetic directional valve respectively, each clamping oil cylinder is provided with a position feedback sensor, a second magnetic spring switch, a position sensor, a position feedback sensor, a first magnetic spring switch, a second magnetic spring switch, a pressure sensor, a feeding electromagnetic directional valve, a servo proportional valve and the clamping electromagnetic directional valve are correspondingly connected with the PLC. Therefore, the PLC sets the processing size of a workpiece, the feeding electromagnetic directional valve is switched, the servo proportional valve is fully opened, the piston rod of the feeding oil cylinder is fed downwards at the maximum speed, the position feedback sensor feeds back the position of the piston rod of the feeding oil cylinder to the PLC in real time, after the feeding oil cylinder descends to a set distance, the opening degree of the PLC adjusts the servo proportional valve becomes smaller, the oil flow of a rodless cavity of the feeding oil cylinder is reduced, the cutting feeding speed is reduced, and vice versa.
Further, each group of cutting mechanism further comprises an upright post, a pressing plate and a guide rail, the motor is arranged on the saw blade through a gear box, the pressing plate is fixed at the tail end of a piston rod of the feeding oil cylinder, the gear box is arranged on the guide rail through the pressing plate, the feeding oil cylinder is fixed on the upright post, and the saw blade and the feeding oil cylinder are vertically arranged. Therefore, a piston rod of the feeding oil cylinder drives the pressing plate to slide along the guide rail, so that the feeding motion of the gear box, the motor and the saw blade is driven.
Further, every clamping mechanism of group still includes supporting seat, fixing base and deck plate, one side of supporting seat is equipped with concave piece and roating seat, one side of fixing base is equipped with the lug, the lug cooperates in concave piece, the lug is installed in cutting mechanism through the fixing base, the opposite side of fixing base is connected in the roating seat, but roating seat horizontal rotation, the opposite side of supporting seat is equipped with clamping cylinder and guiding axle, clamping cylinder vertical setting, work piece profile modeling mould includes die plate and profile modeling bed die, the guiding axle has two, every guiding axle vertically passes the supporting seat and connects the die plate, the die plate is the level setting, die plate is connected to the piston rod end of clamping cylinder, profile modeling bed die is installed in the deck plate. From this, the fixing base is through roating seat level rotation, and when the lug broke away from the concave block, the relative cutting mechanism of supporting seat opened, conveniently changed the saw bit, and when lug and concave block cooperation, the relative cutting mechanism locking of supporting seat, the last stamping plate of clamp cylinder drive moved to the work piece on the profile modeling bed die.
According to another aspect of the present invention, an automatic control method of a numerical control double-station cutter includes the steps of:
(a) PLC controls clamping electromagnetic reversing valve to be conducted, rodless cavity of clamping oil cylinder is filled with oil, and oil is clamped
The cylinder moves downward;
(b) PLC controls the clamping electromagnetic reversing valve to return to the middle position, and the pressure maintaining clamp is used for clamping the hydraulic control one-way valve
Clamping pressure of the oil cylinder;
(c) The PLC controls the electromagnetic reversing valve of the safety door to be conducted, the rodless cavity of the air cylinder is used for air inlet, and the air cylinder moves upwards;
(d) The PLC receives the position signal of the position sensor and judges that the safety door is lifted to the top,
starting a motor, delaying for a set time, controlling a feed electromagnetic reversing valve to be conducted by a PLC, feeding oil into a rodless cavity oil pipe of a feed oil cylinder, controlling the opening of a servo proportional valve to be maximum by the PLC, and feeding the feed oil cylinder at a maximum speed;
(e) The PLC receives the position signal of the position feedback sensor and judges that the feeding position is close to the workpiece
When the device is at the top, the PLC controls the opening of the servo proportional valve to be reduced, and the feeding speed is reduced for cutting;
(f) The PLC receives the position signal of the position feedback sensor to judge when the feeding position approaches
When the feeding position approaches to the 1/3 position of the lower part of the workpiece, the PLC controls the opening of the servo proportional valve to be reduced, and the feeding speed is reduced to cut the workpiece;
(g) The PLC receives the position signal of the position feedback sensor and judges that the feeding position is close to the workpiece
When the feeding control device is at the bottom, the PLC controls the feeding electromagnetic reversing valve to be conducted, a rod cavity of the feeding oil cylinder is filled with oil, the PLC controls the opening of the servo proportional valve to be maximum, the maximum speed of the feeding oil cylinder is reset, and the motor is stopped;
(h) PLC controls the conduction of the electromagnetic reversing valve of the safety door, the rod cavity of the cylinder is used for air intake, and the cylinder faces downwards
And (5) moving, and resetting the safety door.
Further, step (a) is preceded by the step of the PLC receiving the light curtain induction of the safety grating
The signal, judge whether someone or object enters the working area, if yes, the PLC control system scram and control the intermediate relay to turn on the alarm signal lamp and buzzer, if no, start step (a); step (b) and step (c) also include the step, the PLC receives the light curtain induction signal of the safety grating, judges whether a person or an object enters the working area, if yes, the PLC control system scram and controls the intermediate relay to turn on the alarm signal lamp and the buzzer, and if not, the step (c) is started.
Further, the step (a) and the step (b) also comprise the step of receiving a second magnetic spring by the PLC
Judging whether the second reed switch is triggered within a set time by a switch signal of the switch, if yes, starting the step (b), and if not, controlling the intermediate relay to turn on an alarm signal lamp and a buzzer by the PLC; step (c), step (d) also includes the step, PLC receives the switch signal of the first magnetic reed switch, judge whether the first magnetic reed switch is triggered in the settlement time, if yes, PLC control intermediate relay turn on alarm signal lamp and buzzer, if not, begin step (d); and (d) controlling the intermediate relay to conduct the alarm signal lamp and the buzzer by the PLC when the feeding time exceeds the set time.
Further, the step (e) and the step (f) further comprise the steps that the PLC receives a pressure signal of the pressure sensor and judges whether the cutting feeding load exceeds a set value, if yes, the saw blade is replaced, and if not, the step (f) is carried out.
The invention has the advantages of less turnover times of the processed workpiece, high processing efficiency, small equipment occupation area, low manufacturing cost, high processing control precision, high safety performance and convenient maintenance.
Drawings
FIG. 1 is a schematic perspective view of a numerical control double-station cutter of the present invention;
FIG. 2 is a schematic perspective view of a clamping mechanism of the numerical control double-station cutter shown in FIG. 1;
FIG. 3 is a schematic view of a clamping mechanism of the numerical control double-station cutter shown in FIG. 1;
fig. 4 is a schematic structural diagram of a cutting mechanism of the numerical control double-station cutting machine shown in fig. 1 and a hydraulic schematic diagram of the numerical control double-station cutting machine.
Description of the embodiments
The invention is described in further detail below with reference to the accompanying drawings.
As shown in figures 1 and 4, the numerical control double-station cutting machine comprises a cutting mechanism 1, a clamping mechanism 2,
Cutting fluid container 3, nozzle 4, spiral magnetic separator 5, cuttings collection vessel 6, safety gate 7, safety grating 8 and PLC9. The cutting mechanism 1 is mounted in cooperation with the clamping mechanism 2.
The nozzle 4 is connected with the cutting fluid container 3 through the flow regulating valve 10 and the cutting fluid pump 11 in sequence, the nozzle 4 is installed towards the saw blade 1c, the spiral magnetic separator 5 is installed below the saw blade 1c, and the spiral magnetic separator 5 is a CF-200 spiral magnetic separator manufactured by Ruiya, taizhou. A chip collecting container 6 is arranged below the spiral magnetic separator 5, and a cutting fluid container 3 is communicated with the spiral magnetic separator 5. The cutting fluid container 3 sprays cutting fluid through the nozzle 4 to clean the cutting fluid of the cutting station, the spiral magnetic separator 5 is utilized to separate the cutting fluid and the cutting fluid, the separated cutting fluid flows back to the cutting fluid container 3, the cutting fluid falls into the cutting fluid collecting container 6, and the environment of the working ground is kept clean and free from the pollution of the cutting fluid.
The safety gates 7 and the safety grating 8 are provided with two corresponding groups, each safety gate 7 correspondingly covers the saw blade 1c and the workpiece profiling mold 2b, the safety grating 8 is installed along the safety gate 7 in a correlation mode, the safety gate 7 is connected with the air cylinder 12, the air cylinder 12 is vertically arranged, the air cylinder 12 is provided with the position sensor 13 and the first magnetic reed switch 14, the air pressure source 15 is connected with the safety gate electromagnetic directional valve 16, and the safety gate electromagnetic directional valve 16 is correspondingly connected with the rodless cavity of the air cylinder 12 and the rod-containing cavity of the air cylinder 12 through the one-way throttle valve 17 respectively. The safety grating 8 prevents people or objects from entering the working area, and the safety door 7 protects the rotating saw blade 1c from being broken accidentally to splash and hurt people, so that industrial accidents are avoided.
The cutting mechanism 1 comprises two groups, each group of cutting mechanism 1 comprises a feeding oil cylinder 1a, a motor 1b, a saw blade 1c, a stand column 1d, a pressing plate 1e and a guide rail 1f, the saw blade 1c and the feeding oil cylinders 1a are vertically arranged, the feeding oil cylinders 1a adopt Japanese solar iron work 70P-8 series oil cylinders, and each feeding oil cylinder 1a is provided with a position feedback sensor 1g. The motor 1b is mounted on the saw blade 1c through the gear box 1h, the tail end of a piston rod of the feeding oil cylinder 1a is sleeved with a first connecting sleeve 1i, the first connecting sleeve 1i is sleeved with a pressing plate 1e and is fixed by bolts, the outer wall of the feeding oil cylinder 1a is sleeved with a fixing plate 1j and is fixed by bolts, the upright post 1d is fixed below the fixing plate 1j by bolts, and the gear box 1h is mounted on the guide rail 1f through the pressing plate 1 e. The piston rod of the feeding oil cylinder 1a drives the pressing plate 1e to slide along the guide rail 1f, so that the gear box 1h, the motor 1b and the saw blade 1c are driven to move in a feeding mode, and meanwhile, the motor 1b drives the gear box 1h to drive the saw blade 1c to rotate, and the workpiece 18 is cut.
As shown in fig. 1, 2 and 3, the clamping mechanisms 2 have two groups, each group of clamping mechanism 2 comprises a clamping cylinder 2a, a workpiece profiling mold 2b, a supporting seat 2c, a fixing seat 2d and a table top plate 2e, each clamping cylinder 2a is vertically arranged, and each clamping cylinder 2a is provided with a second magnetic reed switch 2f. One side of the supporting seat 2c is provided with a concave block 2g and a rotating seat 2h, one side of the fixed seat 2d is provided with a convex block 2i, and the convex block 2i is fixed on the upright column 1d through a fixed seat 2d bolt. The opposite side of fixing base 2d is connected in roating seat 2h, and roating seat 2h embeds there is round pin axle 2j, and round pin axle 2 j's top bolt fastening has limiting plate 2k, and round pin axle 2 j's both ends compress tightly in roating seat 2 h's inner wall through thrust copper bush 2 l. The clamping cylinder 2a is mounted on the other side of the supporting seat 2c, the workpiece profiling die 2b comprises an upper die pressing plate 2m and a profiling lower die 2n, the upper die pressing plate 2m is horizontally arranged and made of polyurethane materials, a nut 2o is sleeved at the tail end of a piston rod of the clamping cylinder 2a, a second connecting sleeve 2p is sleeved on the nut 2o, a base plate 2q is fixed below the second connecting sleeve 2p through bolts, two guide shafts 2r vertically penetrate through the supporting seat 2c through linear bearings 2s and are connected with the base plate 2q, and the upper die pressing plate 2m is fixed below the base plate 2q through bolts. The deck plate 2e is fixed on the upright column 1d through bolts, a module fixing plate 2t, a template 2u and a profiling lower die 2n are sequentially arranged above the deck plate 2e, the deck plate 2e and the module fixing plate 2t are positioned through a flat key 2v, the module fixing plate 2t and the template 2u are positioned through the flat key 2v, the template 2u is pressed and fixed through a pressing plate oil cylinder 2w, and the pressing plate oil cylinder 2w adopts NOS series pressing plate oil cylinders produced by a tin-free jun sail, so that the profiling lower die 2n is replaced quickly. When the convex block 2i is matched with the concave block 2g, the locking plate 2x on the concave block 2g rotates to the positioning column 2y clamped on the convex block 2i, so that the convex block 2i is locked with the concave block 2g, the supporting seat 2c and the fixing seat 2d are locked relative to the upright column 1d, and the clamping cylinder 2a drives the upper die pressing plate 2m to move downwards to clamp a workpiece on the profiling lower die 2 n. The locking plate 2x on the concave block 2g is unlocked with the positioning column 2y on the convex block 2i, the fixed seat 2d drives the rotating seat 2h to horizontally rotate along the pin shaft 2j, and when the convex block 2i is separated from the concave block 2g, the supporting seat 2c and the fixed seat 2d are opened relative to the upright column 1d, so that the saw blade 1c can be replaced conveniently.
Because the two ends of the workpiece 18 are positioned by adopting the two workpiece profiling molds 2b imitating the shape of the workpiece and clamped by utilizing the two clamping cylinders 2a, the positioning precision is high, the clamping position is close to the cutting section, the vibration of the workpiece 18 in the processing process is reduced, the two feeding cylinders 1a respectively drive the motor 1b and the saw blade 1c to do feeding motion to the workpiece 18, and the motor 1b drives the saw blade 1c to rotate to cut the two ends of the workpiece 18, so that the two groups of cutting mechanisms 1 synchronously cut the two ends of the workpiece 18, the number of times of the workpiece 18 is reduced, the processing efficiency is improved, and the occupied area of equipment is reduced, thereby reducing the cost.
As shown in fig. 1 and 4, the PLC9 is correspondingly connected to the position sensor 13, the position feedback sensor 1g, the first reed switch 14, the second reed switch 2f, the pressure sensor 19, the feeding electromagnetic directional valve 20, the servo proportional valve 21 and the clamping electromagnetic directional valve 22, the rodless cavity of each feeding cylinder 1a is sequentially connected to the pressure sensor 19, the feeding hydraulic control check valve 23, the servo proportional valve 21 and the feeding electromagnetic directional valve 20, the rod cavity of each feeding cylinder 1a is sequentially connected to the feeding hydraulic control check valve 23 and the feeding electromagnetic directional valve 20, the feeding electromagnetic directional valve 20 is connected to the hydraulic pressure source 24, and the hydraulic pressure source 24 is connected to the electromagnetic overflow valve 25. The rodless cavity and the rod cavity of each clamping cylinder 2a are respectively connected with a clamping hydraulic control one-way valve 26 and a clamping electromagnetic directional valve 22 in sequence, and the clamping electromagnetic directional valve 22 is connected with a hydraulic source 24. The PLC9 sets the processing size of the workpiece, the feeding electromagnetic directional valve 20 is switched, the servo proportional valve 21 is fully opened, the piston rod of the feeding oil cylinder 1a is fed downwards at the maximum speed, the position feedback sensor 1g feeds back the position of the piston rod of the feeding oil cylinder 1a to the PLC9 in real time, after the position feedback sensor descends to a set distance, the PLC9 adjusts the opening degree of the servo proportional valve 21 to be smaller, the oil flow of the rodless cavity of the feeding oil cylinder 1a is reduced, and the cutting feeding speed is reduced, and vice versa.
The cutting feeding motion adopts a closed-loop control system of the servo proportional valve 21 and the position feedback sensor 1g, is stable and reliable, has high control precision, effectively overcomes the defect that the numerical control system cannot accurately judge a position signal due to the position feedback of the servo proportional valve 21, and the feeding motion of the feeding cylinder 1a is accurately fed back to the numerical control system through the position feedback of the position feedback sensor 1g, so that the valve core control of the servo proportional valve 21 is accurately positioned by the negative feedback of the servo proportional amplifier, and the feeding motion instruction of the numerical control system is ensured by the position feedback sensor 1g, and the double control of the position is more accurate.
The automatic control method of the numerical control double-station cutting machine comprises two groups of completely synchronous cutting mechanisms 1,
The control method of the clamping mechanism 2, the safety door 7 and the safety grating 8 comprises the following steps of:
(a) The PLC9 receives the light curtain induction signal of the safety grating 8 and judges whether a person or an object enters the safety grating
If yes, the PLC9 control system scram and controls the intermediate relay to turn on the alarm signal lamp and the buzzer, if not, the step (b) is started;
(b) The PLC9 controls the clamping electromagnetic directional valve 22 to be conducted, the rodless cavity of the clamping oil cylinder 2a is filled with oil,
the clamp cylinder 2a moves downward;
(c) The PLC9 receives the switching signal of the second reed switch 2f and judges that the second reed switch 2f is in the state of
If the trigger is triggered within the set time, starting the step (d), and if the trigger is not triggered, controlling the intermediate relay to conduct an alarm signal lamp and a buzzer by the PLC 9;
(d) The PLC9 controls the clamping electromagnetic directional valve 22 to return to the middle position, and the clamping hydraulic control one-way valve 26 is used for controlling the clamping electromagnetic directional valve
The clamping pressure of the pressure maintaining and clamping cylinder 2 a;
(e) The PLC9 receives the light curtain induction signal of the safety grating 8, judges whether a person or an object enters a working area, if yes, the PLC9 controls the system to stop suddenly and controls the intermediate relay to turn on the alarm signal lamp and the buzzer, and if no, the step (f) is started;
(f) The PLC9 controls the electromagnetic reversing valve 16 of the safety door to be conducted, the rodless cavity of the air cylinder 12 is used for air intake, and the air cylinder 12 moves upwards;
(g) The PLC9 receives the switching signal of the first reed switch 14 and judges that the first reed switch 14 is in the state of
Whether triggering is carried out in the set time is judged, if yes, the PLC9 controls the intermediate relay to conduct the alarm signal lamp and the buzzer, and if not, the step (h) is started;
(h) The PLC9 receives the position signal from the position sensor 13 and determines that the safety door 7 is raised
Starting the motor 1b to the top, delaying the set time, controlling the feed electromagnetic reversing valve 20 to be conducted by the PLC9, feeding oil into the rodless cavity oil pipe of the feed oil cylinder 1a, controlling the opening of the servo proportional valve 21 to be maximum by the PLC9, feeding the feed oil cylinder 1a at the maximum speed, and controlling the intermediate relay to conduct the alarm signal lamp and the buzzer by the PLC9 when the feed time exceeds the set time;
(i) The PLC9 receives the position signal of the position feedback sensor 1g and judges that the feeding position is close to
When the top of the workpiece 18 is processed, the PLC9 controls the opening of the servo proportional valve 21 to be reduced, and the feeding speed is reduced for cutting;
(j) The PLC9 receives the pressure signal of the pressure sensor 19 and judges whether the cutting feed load exceeds a set value, if so, the saw blade 1c is replaced, and if not, the step (k) is carried out;
when the feeding oil cylinder 1a pushes the saw blade 1c to rotationally cut off the workpiece 18 in a normal working condition, the pressure of the rodless cavity of the feeding oil cylinder 1a is a pressure value in a certain range, when the rotating saw blade 1c is worn, the blade 1c cannot cut off the workpiece 18 after the blade is blunt or the saw blade 1c is damaged, the load of the feeding oil cylinder 1a is increased, the pressure of the rodless cavity of the feeding oil cylinder 1a rises and exceeds a set value, an alarm prompts replacement of the saw blade 1c, and the cutting mechanism 1 is protected from cutting the workpiece 18 when the saw blade 1c is damaged;
(k) The PLC9 receives a position signal of the position feedback sensor 1g to judge, when the feeding position is close to the 1/3 position of the upper part of the workpiece 18, the PLC9 controls the opening of the servo proportional valve 21 to be increased, the workpiece 18 is cut in a feeding acceleration mode, and when the feeding position is close to the 1/3 position of the lower part of the workpiece 18, the PLC9 controls the opening of the servo proportional valve 21 to be reduced, and the workpiece 18 is cut in a feeding deceleration mode;
(l) The PLC9 receives the position signal of the position feedback sensor 1g and judges that the feeding position is close to
When the bottom of the workpiece 18 is provided, the PLC9 controls the feed electromagnetic directional valve 20 to be conducted, a rod cavity of the feed oil cylinder 1a is filled with oil, the PLC9 controls the opening of the servo proportional valve 21 to be maximum, the maximum speed of the feed oil cylinder 1a is reset, and the motor 1b is stopped;
(m) the PLC9 controls the electromagnetic directional valve 16 of the safety door to be conducted, the rod cavity of the cylinder 12 is used for air intake,
the cylinder 12 moves downward and the safety door 7 is reset.
What has been described above is merely some embodiments of the present invention. It will be apparent to those skilled in the art that various modifications and improvements can be made without departing from the spirit of the invention.
Claims (6)
1. The control method of the numerical control double-station cutting machine is characterized in that the numerical control double-station cutting machine comprises a cutting mechanism (1), a clamping mechanism (2), a safety door (7), a safety grating (8), a PLC (9), a feeding electromagnetic directional valve (20), a servo proportional valve (21), a feeding hydraulic control one-way valve (23), a pressure sensor (19), a clamping electromagnetic directional valve (22) and a clamping hydraulic control one-way valve (26), the cutting mechanism (1) comprises two groups, each group of cutting mechanism (1) comprises a feeding cylinder (1 a), a motor (1 b) and a saw blade (1 c), the saw blade (1 c) is mounted on the motor (1 b), the motor (1 b) is mounted on the feeding cylinder (1 a), the clamping mechanism (2) comprises two groups, each group of clamping mechanism (2) comprises a clamping cylinder (2 a), a supporting seat (2 b), a fixing seat (2 d) and a table panel (2 e), the workpiece profiling mold (2 b) is mounted on the clamping cylinder (2 a), one side of the supporting seat (2 c) is provided with a concave block (2 g) and one side (i) of the fixing seat (2 h) is provided with a concave block (2 g), the bump (2 i) is arranged on the cutting mechanism (1) through a fixed seat (2 d), the other side of the fixed seat (2 d) is connected with a rotating seat (2 h), the rotating seat (2 h) can horizontally rotate, the other side of the supporting seat (2 c) is provided with a clamping cylinder (2 a) and a guide shaft (2 r), the clamping cylinder (2 a) is vertically arranged, the workpiece profiling mold (2 b) comprises an upper molding plate (2 m) and a profiling lower mold (2 n), the guide shafts (2 r) are two, each guide shaft (2 r) vertically penetrates through the supporting seat (2 c) and is connected with the upper molding plate (2 m), the upper molding plate (2 m) is horizontally arranged, the end of a piston rod of the clamping cylinder (2 a) is connected with an upper die pressing plate (2 m), the profiling lower die (2 n) is arranged on a table top plate (2 e), two groups of cutting mechanisms (1) and two groups of clamping mechanisms (2) are arranged in a matched mode, the safety gate (7) covers the saw blade (1 c) and the workpiece profiling die (2 b), the safety grating (8) is arranged in a correlation mode along the safety gate (7), the safety gate (7) is connected with an air cylinder (12), the air cylinder (12) is vertically arranged, the air cylinder (12) is provided with a position sensor (13) and a first magnetic spring switch (14), the cylinder (12) is connected with an air pressure source (15) through a safety gate electromagnetic directional valve (16), the safety gate electromagnetic directional valve (16) is correspondingly connected with a rodless cavity of the cylinder (12) and a rod cavity of the cylinder (12), the rodless cavity of each feeding cylinder (1 a) is sequentially connected with a pressure sensor (19), a feeding hydraulic control one-way valve (23), a servo proportional valve (21) and a feeding electromagnetic directional valve (20), the rod cavity of each feeding cylinder (1 a) is sequentially connected with the feeding hydraulic control one-way valve (23) and the feeding electromagnetic directional valve (20), the feeding electromagnetic directional valve (20) is connected with a hydraulic source (24), the rodless cavity and the rod cavity of each clamping cylinder (2 a) are sequentially connected with a clamping hydraulic control one-way valve (26) and a clamping electromagnetic directional valve (22), the clamping electromagnetic directional valve (22) is connected with the hydraulic source (24), each feeding cylinder (1 a) is provided with a position feedback sensor (1 g), each clamping cylinder (2 a) is provided with a second magnetic reed switch (2 f), the position sensor (13), the position sensor (1 g), the first magnetic reed switch (21), the second magnetic reed switch (14), the first magnetic reed switch (14), the second magnetic reed switch (2 f) and the magnetic reed switch (2 f) The clamping electromagnetic reversing valve (22) is correspondingly connected with the PLC (9);
the control step of the numerical control double-station cutting machine is as follows:
(a) The PLC (9) controls the conduction of the clamping electromagnetic reversing valve (22) and the absence of the clamping oil cylinder (2 a)
The rod cavity is filled with oil, and the clamping oil cylinder (2 a) moves downwards;
(b) The PLC (9) controls the clamping electromagnetic reversing valve (22) to return to the middle position, and the clamping hydraulic control unit is used for controlling the clamping electromagnetic reversing valve to return to the middle position
The clamping pressure of the clamping cylinder (2 a) is maintained to the valve (26);
(c) The PLC (9) controls the conduction of an electromagnetic reversing valve (16) of the safety door, the rodless cavity of the air cylinder (12) is used for air intake, and the air cylinder (12) moves upwards;
(d) The PLC (9) receives the position signal of the position sensor (13) and judges the safety door
(7) Rising to the top, starting a motor (1 b), delaying for set time, controlling a feed electromagnetic reversing valve (20) to be conducted by a PLC (9), feeding oil into a rodless cavity oil pipe of a feed oil cylinder (1 a), controlling the opening of a servo proportional valve (21) to be maximum by the PLC (9), and feeding the feed oil cylinder (1 a) at the maximum speed;
(e) The PLC (9) receives the position signal of the position feedback sensor (1 g) and judges the feeding position
When the cutting tool is close to the top of a workpiece (18), the PLC (9) controls the opening of the servo proportional valve (21) to be reduced, and the feeding speed is reduced for cutting;
(f) The PLC (9) receives the position signal of the position feedback sensor (1 g) to judge when the vehicle enters
When the feeding position is close to the 1/3 position of the upper part of the workpiece (18), the PLC (9) controls the opening of the servo proportional valve (21) to be increased, the workpiece (18) is cut in a feeding acceleration mode, and when the feeding position is close to the 1/3 position of the lower part of the workpiece (18), the PLC (9) controls the opening of the servo proportional valve (21) to be reduced, and the workpiece (18) is cut in a feeding deceleration mode;
(g) The PLC (9) receives the position signal of the position feedback sensor (1 g) and judges the feeding position
When the feeding device is close to the bottom of a workpiece (18), the PLC (9) controls the feeding electromagnetic reversing valve (20) to be conducted, a rod cavity of the feeding oil cylinder (1 a) is used for feeding oil, the PLC (9) controls the opening of the servo proportional valve (21) to be maximum, the maximum speed of the feeding oil cylinder (1 a) is reset, and the motor (1 b) is stopped;
(h) The PLC (9) controls the conduction of an electromagnetic reversing valve (16) of a safety door, and a rod of the air cylinder (12) is arranged
The cavity is filled with air, the air cylinder (12) moves downwards, and the safety door (7) is reset.
2. The control method of a numerical control double-station cutter according to claim 1, wherein,
step (a) is preceded by the further step of,
the PLC (9) receives the light curtain induction signal of the safety grating (8) and judges whether a person or an object enters a working area, if yes, the PLC (9) control system scram and controls the intermediate relay to turn on the alarm signal lamp and the buzzer, and if not, the step (a) is started;
the steps (b) and (c) also comprise the steps,
and (c) the PLC (9) receives the light curtain induction signal of the safety grating (8) and judges whether a person or an object enters the working area, if so, the PLC (9) control system scram and controls the intermediate relay to conduct the alarm signal lamp and the buzzer, and if not, the step (c) is started.
3. The control method of a numerical control double-station cutter according to claim 1, wherein,
the steps (a) and (b) also comprise the steps,
the PLC (9) receives a switching signal of the second magnetic reed switch (2 f) and judges whether the second magnetic reed switch (2 f) is triggered within a set time, if yes, the step (b) is started, and if not, the PLC (9) controls the intermediate relay to conduct an alarm signal lamp and a buzzer;
the steps (c) and (d) also comprise the steps,
the PLC (9) receives a switching signal of the first magnetic reed switch (14) and judges whether the first magnetic reed switch (14) is triggered within a set time, if yes, the PLC (9) controls the intermediate relay to conduct an alarm signal lamp and a buzzer, and if not, the step (d) is started;
and (d) controlling the intermediate relay to conduct the alarm signal lamp and the buzzer by the PLC (9) when the feeding time exceeds the set time.
4. The control method of a numerical control double-station cutter according to claim 1, wherein,
the steps (e) and (f) also comprise the steps,
the PLC (9) receives a pressure signal of the pressure sensor (19) and judges whether the cutting feeding load exceeds a set value, if so, the saw blade (1 c) is replaced, and if not, the step (f) is carried out.
5. The control method of the numerical control double-station cutting machine according to claim 1, characterized in that the numerical control double-station cutting machine further comprises a cutting fluid container (3), a nozzle (4), a spiral magnetic separator (5) and a chip collecting container (6), wherein the nozzle (4) is communicated with the cutting fluid container (3), the nozzle (4) is installed towards a saw blade (1 c), the spiral magnetic separator (5) is installed below the saw blade (1 c), the chip collecting container (6) is installed below the spiral magnetic separator (5), and the cutting fluid container (3) is communicated with the spiral magnetic separator (5).
6. The control method of the numerical control double-station cutting machine according to claim 1, wherein each group of cutting mechanisms (1) further comprises a stand column (1 d), a pressing plate (1 e) and a guide rail (1 f), the motor (1 b) is mounted on the saw blade (1 c) through a gear box (1 h), the pressing plate (1 e) is fixed at the tail end of a piston rod of the feeding cylinder (1 a), the gear box (1 h) is mounted on the guide rail (1 f) through the pressing plate (1 e), the feeding cylinder (1 a) is fixed on the stand column (1 d), and the saw blade (1 c) and the feeding cylinder (1 a) are vertically arranged.
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| CN110508871B (en) * | 2019-09-02 | 2020-11-03 | 盐城市金良窗饰有限公司 | Spark anti-splash device for stainless steel cutting |
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